My largest adult male is right at 7 feet. My mature breeder females are right at 6.5 feet. In my opinion, a 3 foot, 2 year old is running somewhat to the smallish side. I'll hedge that in that I do not know how your snake was fed during the winter months. I had one male reach 44" in one year, but that snake was not brumated and was maintained on his feeding schedule troughout his first winter. Brumate your jani just like any other colubrid. The temps where I live(east central Florida coast) don't maintain a continual mid-50's in the winter time. That said, my jani cycle without issue and breed every year.
The deppei complex has a reputation for regurge issues when young. They will most certainly perish if you try to feed them like a northern pine or a bull snake. They have slower metabolisms and you must be cognizant of this fact. That said, many people are afraid to feed their youngsters anything larger than a pinky mouse for months on end. Then they will go with two pinkies instead of a single larger food item. Mine have always grown well as I start them out on peach fuzzies and gradually increase the size of a single food item. Once they are feeding without issues for about six months, these snakes are pretty much bullet proof as long as temps remain in the 70-82 degree range..........just my 2 cents!
